http://arduino.cc/forum/index.php/topic,123306.msg931694.html#msg931694
から
http://www.railways-in-miniature.co.uk/electronics/arduino/V-USB%20on%20Arduino.zip
をダウンロード。
usbdrv.hをArduinoのライブラリフォルダに入れる。
サンプル
Mouse.ino
#include <avr/io.h> #include <avr/interrupt.h> #include <avr/wdt.h> #include <util/delay.h> /* for _delay_ms() */ #include <avr/eeprom.h> #include <avr/pgmspace.h> /* required by usbdrv.h */ extern "C"{ //Put all usbdrv functions in HERE! #include "usbdrv.h" #if USE_INCLUDE #include "usbdrv.c" #endif #include "oddebug.h" /* This is also an example for using debug macros */ /* ------------------------------------------------------------------------- */ /* ----------------------------- USB interface ----------------------------- */ /* ------------------------------------------------------------------------- */ PROGMEM char usbHidReportDescriptor[52] = { /* USB report descriptor, size must match usbconfig.h */ 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 0x09, 0x02, // USAGE (Mouse) 0xa1, 0x01, // COLLECTION (Application) 0x09, 0x01, // USAGE (Pointer) 0xA1, 0x00, // COLLECTION (Physical) 0x05, 0x09, // USAGE_PAGE (Button) 0x19, 0x01, // USAGE_MINIMUM 0x29, 0x03, // USAGE_MAXIMUM 0x15, 0x00, // LOGICAL_MINIMUM (0) 0x25, 0x01, // LOGICAL_MAXIMUM (1) 0x95, 0x03, // REPORT_COUNT (3) 0x75, 0x01, // REPORT_SIZE (1) 0x81, 0x02, // INPUT (Data,Var,Abs) 0x95, 0x01, // REPORT_COUNT (1) 0x75, 0x05, // REPORT_SIZE (5) 0x81, 0x03, // INPUT (Const,Var,Abs) 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 0x09, 0x30, // USAGE (X) 0x09, 0x31, // USAGE (Y) 0x09, 0x38, // USAGE (Wheel) 0x15, 0x81, // LOGICAL_MINIMUM (-127) 0x25, 0x7F, // LOGICAL_MAXIMUM (127) 0x75, 0x08, // REPORT_SIZE (8) 0x95, 0x03, // REPORT_COUNT (3) 0x81, 0x06, // INPUT (Data,Var,Rel) 0xC0, // END_COLLECTION 0xC0, // END COLLECTION }; /* This is the same report descriptor as seen in a Logitech mouse. The data * described by this descriptor consists of 4 bytes: * . . . . . B2 B1 B0 .... one byte with mouse button states * X7 X6 X5 X4 X3 X2 X1 X0 .... 8 bit signed relative coordinate x * Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 .... 8 bit signed relative coordinate y * W7 W6 W5 W4 W3 W2 W1 W0 .... 8 bit signed relative coordinate wheel */ typedef struct{ uchar buttonMask; char dx; char dy; char dWheel; }report_t; static report_t reportBuffer; static int sinus = 7 << 6, cosinus = 0; static uchar idleRate; /* repeat rate for keyboards, never used for mice */ /* The following function advances sin/cos by a fixed angle * and stores the difference to the previous coordinates in the report * descriptor. * The algorithm is the simulation of a second order differential equation. */ static void advanceCircleByFixedAngle(void) { char d; #define DIVIDE_BY_64(val) (val + (val > 0 ? 32 : -32)) >> 6 /* rounding divide */ reportBuffer.dx = d = DIVIDE_BY_64(cosinus); sinus += d; reportBuffer.dy = d = DIVIDE_BY_64(sinus); cosinus -= d; } /* ------------------------------------------------------------------------- */ usbMsgLen_t usbFunctionSetup(uchar data[8]) { usbRequest_t *rq = (usbRequest_t *)data; /* The following requests are never used. But since they are required by * the specification, we implement them in this example. */ if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){ /* class request type */ DBG1(0x50, &rq->bRequest, 1); /* debug output: print our request */ if(rq->bRequest == USBRQ_HID_GET_REPORT){ /* wValue: ReportType (highbyte), ReportID (lowbyte) */ /* we only have one report type, so don't look at wValue */ usbMsgPtr = (unsigned char *)&reportBuffer; return sizeof(reportBuffer); }else if(rq->bRequest == USBRQ_HID_GET_IDLE){ usbMsgPtr = &idleRate; return 1; }else if(rq->bRequest == USBRQ_HID_SET_IDLE){ idleRate = rq->wValue.bytes[1]; } }else{ /* no vendor specific requests implemented */ } return 0; /* default for not implemented requests: return no data back to host */ } } //end extern "C" /* ------------------------------------------------------------------------- */ int __attribute__((noreturn)) main(void) { uchar i; wdt_enable(WDTO_1S); /* Even if you don't use the watchdog, turn it off here. On newer devices, * the status of the watchdog (on/off, period) is PRESERVED OVER RESET! */ /* RESET status: all port bits are inputs without pull-up. * That's the way we need D+ and D-. Therefore we don't need any * additional hardware initialization. */ odDebugInit(); DBG1(0x00, 0, 0); /* debug output: main starts */ usbInit(); usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */ i = 0; while(--i){ /* fake USB disconnect for > 250 ms */ wdt_reset(); _delay_ms(1); } usbDeviceConnect(); sei(); DBG1(0x01, 0, 0); /* debug output: main loop starts */ for(;;){ /* main event loop */ DBG1(0x02, 0, 0); /* debug output: main loop iterates */ wdt_reset(); usbPoll(); if(usbInterruptIsReady()){ /* called after every poll of the interrupt endpoint */ advanceCircleByFixedAngle(); DBG1(0x03, 0, 0); /* debug output: interrupt report prepared */ usbSetInterrupt((unsigned char *)&reportBuffer, sizeof(reportBuffer)); } } } /* ------------------------------------------------------------------------- */
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